Estudos sobre o decaimento raro Z → J/ψl+l − com o experimento CMS

• Autor(a) principal: Souza, Bernard Lucas Brandão Suhett de
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/16407
• topic: CMS; Rare decay; Proton-proton collision; Particles (Nuclear physics); Compact muon solenoid; Proton-proton interactions; Monte Carlo method; CMS; Decaimento raro; Colisões próton-próton; Partículas (Física nuclear); Solenóide de múon compacto; Interações próton-próton; Monte Carlo, Método de; CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DAS PARTICULAS ELEMENTARES E CAMPOS::TEORIA GERAL DE PARTICULAS E CAMPOS

This work presents a study of the observation of a Z boson rare decay into a J/ψ meson and two leptons of the same flavor and opposite charges in the CMS detector. A study was performed with Monte Carlo simulation samples for an initial development of the selection criteria using the physical objects used in the signal selection. After having applied the signal selection to simulation, the results were compared to data from a previously published paper by the CMS collaboration, that was used as a reference for this study. The data were obtained from proton-proton collisions with center of mass energy of 13 TeV and integrated luminosity of 35.9 fb−1.